PR-30Codar Pre-Selector 1.5-30mhz. made for use with Codar CR-70A but could be used with any HF Receiver,
requires HT and heater supply from external source (eg from CR-70A). It uses an EF183 Frame Grid valve as a tuned RF Amp with up to 20db gain.

RQ-10Codar Q-Multiplier dating from the mid-1960s with the classic Codar design style in silver and black.
The main control varies IF Passband on LSB or USB, the one on the left controls the peaking and the switch on the right cuts the Q-multiplier or selects it for peak or null.